The Working Formulation is an obsolete classification of non Hodgkin lymphoma s published in 1982. It has since been replaced by other lymphoma classifications, the latest published by the World Health Organization WHO in 2008, but is still used by cancer agencies for compilation of lymphoma statistics. Low Grade Malignant Lymphoma, small lymphocytic chronic lymphocytic leukemia Malignant Lymphoma, Follicular lymphoma follicular , predominantly small cleaved cell Malignant Lymphoma, Follicular lymphoma follicular , mixed small cleaved and large cell Intermediate grade Malignant Lymphoma, Follicular lymphoma follicular , predominantly large cell Malignant Lymphoma, diffuse, small cleaved cell Malignant Lymphoma, diffuse, mixed small and large cell Malignant Lymphoma, diffuse, large cell High grade Malignant Lymphoma, large cell, immunoblastic Malignant Lymphoma, lymphoblastic Malignant Lymphoma, small non cleaved cells Burkitt s lymphoma Miscellaneous Composite Mycosis fungoides Histiocytic Extramedullary plasmacytoma Unclassifiable Hematological malignancy histology Category Lymphoma ... more details
Infobox Disease Name PAGENAME Image Primary mediastinal large B cell lymphoma high mag.jpg Caption Micrograph of a primary mediastinal large B cell lymphoma , a type of large cell lymphoma. H&E stain . DiseasesDB ICD10 ICD9 ICD9 200.7 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID D016403 One classification system for lymphoma s divides the diseases according to the size of the white blood cell s that has turned cancerous. The large cell lymphomas have large cells. A large cell, in this context, has a diameter of 17 to 20 m. ref name isbn0 7817 5007 5 cite book author Turgeon, Mary Louise title Clinical hematology theory and procedures publisher Lippincott Williams & Wilkins location Hagerstown, MD year 2005 pages 221 isbn 0 7817 5007 5 ref Other groups of lymphomas in this system are the small cell lymphoma s and mixed cell lymphoma s. Types B cell Diffuse large B cell lymphoma is the most common of the large cell lymphomas. Medical Subject Headings MeSH now classifies the phrase large cell lymphoma under Diffuse large B cell lymphoma . ref MeshName Large cell lymphoma ref Many other B cell lymphoma s feature large cells Angiocentric lymphoma Burkitt s lymphoma Follicular large cell lymphoma Immunoblastic lymphoma Intravascular large cell lymphoma Mediastinal tumor Primary mediastinal B cell lymphoma T cell rich B cell lymphoma Primary splenomegaly splenic lymphoma rare Primary central nervous system lymphoma s, which are often diffuse large B cell lymphomas Activated B Cell Diffuse Large B Cell Lymphoma, or ABC DLBCL, is believed to be caused by aberrant activation of a critical intracellular pathway. This intracellular signaling pathway involved in B cell activation and proliferation stays constantly activated, driving lymphocytes to proliferate continuously. The inhibition of this pathway can be induced by a drug known as NEMO Binding Domain, or NBD, a peptide causing increased cell death of malignant lymphocytes. T cell Less commonly, a large cell l ... more details
This classification system is how the United States agency, the Centers for Disease Control and Prevention Centers for Disease Control and Prevention CDC classifies HIV disease and infection. This is to allow the government to handle epidemic statistics and define who receives US government assistance. In 1993, the CDC added pulmonary tuberculosis , recurrent pneumonia , and invasive cervical cancer to the list of clinical conditions in the AIDS surveillance case definition published in 1987 and expanded the AIDS surveillance case definition to include all HIV infected persons with CD4 T lymphocyte counts of less than 200 cells uL or a CD4 percentage of less than 14. Considerable variation exists in the relative risk of death following different AIDS defining clinical conditions. According to the US CDC definition, one has AIDS if he she is infected with HIV and present with one of the following A CD4 T cell count below 200 cells l or a CD4 T cell percentage of total lymphocytes of less than 14 . or he she has one of the following defining illnesses Candidiasis of bronchi, trachea, or lungs Candidiasis esophageal Cervical cancer invasive Coccidioidomycosis , disseminated or extrapulmonary Cryptococcosis , extrapulmonary Cryptosporidiosis , chronic intestinal for longer than 1 month Cytomegalovirus disease other than liver , spleen or lymph nodes Encephalopathy HIV related Herpes simplex chronic ulcer s for more than 1 month or bronchitis , pneumonitis , or esophagitis Histoplasmosis , disseminated or extrapulmonary Isosporiasis , chronic intestinal for more than 1 month Kaposi s sarcoma Lymphoma Burkitt s , immunoblastic or primary brain Mycobacterium avium complex Mycobacterium, other species, disseminated or extrapulmonary Pneumocystis jiroveci pneumonia Pneumocystis carinii pneumonia Pneumonia recurrent Progressive multifocal leukoencephalopathy Salmonella septicemia recurrent Toxoplasmosis of the brain Tuberculosis Wasting syndrome due to HIV People who are not ... more details
Infobox disease Name Primary central nervous system lymphoma ICD10 ICD9 ICD9 200.5 Image Primary central nervous system B cell non Hodgkin lymphoma.jpg Caption Brain magnetic resonance imaging showing primary central nervous system B cell non Hodgkin lymphoma of the sella turcica and hypothalamus , continuing to the tectum intensely white areas in the middle . ICDO OMIM DiseasesDB 29451 MedlinePlus eMedicineSubj article eMedicineTopic 1157638 A primary central nervous system lymphoma PCNSL , also known as microglioma and primary brain lymphoma , ref cite web url http www.diseasesdatabase.com ddb29451.htm title CNS lymphoma, primary information work Diseases Database accessdate 17 April 2011 ref is a brain tumor primary intracranial tumor appearing mostly in patients with severe immunosuppression typically patients with AIDS . PCNSLs represent around 20 of all cases of lymphoma s in HIV infections other types are Burkitt s lymphoma s and immunoblastic lymphomas . Primary Central nervous system CNS lymphoma is highly associated with Epstein Barr virus EBV infection 90 in Immunodeficiency immunodeficient patients such as those with AIDS and those Iatrogenesis iatrogenically immunosuppressed , ref cite journal author Fine HA, Mayer RJ title Primary central nervous system lymphoma journal Ann. Intern. Med. volume 119 issue 11 pages 1093 104 year 1993 month December pmid 8239229 ref and does not have a predilection for any particular age group. Mean CD4 count at time of diagnosis is 50 uL. In immunocompromised patients, prognosis is usually poor. In immunocompetent patients that is, patients who do not have AIDS or some other immunodeficiency , there is rarely an association with EBV infection or other Virus DNA viruses DNA viruses . In the immunocompetent population, PCNSLs typically appear in older patients in their 50 s and 60 s. Importantly, the incidence of PCNSL in the immunocompetent population has been reported to have increased more than 10 fold from 2.5 cases to ... more details
Infobox Disease Name PAGENAME Image Caption DiseasesDB ICD10 ICD10 C 84 4 c 81 ILDS C84.460 ICD9 ICDO 9705 3 ref name who1 OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID D007119 Angioimmunoblastic T cell lymphoma AILT also known as Angioimmunoblastic lymphadenopathy with dysproteinemia ref name Andrews cite book author James, William D. Berger, Timothy G. et al. title Andrews Diseases of the Skin clinical Dermatology publisher Saunders Elsevier location year 2006 pages isbn 0 7216 2921 0 oclc doi accessdate ref rp 747 is a mature T cell lymphoma with systemic characterized by a polymorphous lymph node infiltrate showing a marked increase in follicular dendritic cells FDCs and high endothelial venules HEVs and systemic involvement. ref name who1 It is also known as immunoblastic lymphadenopathy Lukes Collins Classification and AILD type lymphogranulomatosis X T cell lymphoma Kiel Classification ref name who1 http www.iarc.fr WHO BlueBooks BBwebsite bb3.html Jaffe E.S., Harris N.L., Stein H., Vardiman J.W. eds World Health Organization Classification of Tumors. Pathology and Genetics of Tumours of Haemopoietic and Lymphoid Tissues. IARC Press Lyon 2001 ref Epidemiology The typical patient with angioimmunoblastic T cell lymphoma AILT is either middle aged or elderly, and no gender preference for this disease has been observed. ref name who1 AILT comprises 15 20 of peripheral T cell lymphomas and 1 2 of all non Hodgkin lymphomas. ref name anon1 cite journal title A clinical evaluation of the International Lymphoma Study Group classification of non Hodgkin s lymphoma. The Non Hodgkin s Lymphoma Classification Project journal Blood volume 89 issue 11 pages 3909 18 year 1997 month June pmid 9166827 ref Clinical features Etiology This disease was originally thought to be a premalignant condition, termed angioimmunoblastic lymphadenopathy, and this atypical reactive lymphadenopathy carried a risk for transformation into a lymphoma. Currently, it is postulated that the ... more details
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